1 | <?php |
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2 | /*********************************************** |
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3 | * File : streamer.php |
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4 | * Project : Z-Push |
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5 | * Descr : This file handles streaming of |
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6 | * WBXML SyncObjects. It must be |
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7 | * subclassed so the internals of |
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8 | * the object can be specified via |
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9 | * $mapping. Basically we set/read |
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10 | * the object variables of the |
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11 | * subclass according to the mappings |
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12 | * |
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13 | * Created : 01.10.2007 |
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14 | * |
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15 | * Copyright 2007 - 2012 Zarafa Deutschland GmbH |
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16 | * |
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17 | * This program is free software: you can redistribute it and/or modify |
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18 | * it under the terms of the GNU Affero General Public License, version 3, |
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19 | * as published by the Free Software Foundation with the following additional |
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20 | * term according to sec. 7: |
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21 | * |
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22 | * According to sec. 7 of the GNU Affero General Public License, version 3, |
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23 | * the terms of the AGPL are supplemented with the following terms: |
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24 | * |
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25 | * "Zarafa" is a registered trademark of Zarafa B.V. |
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26 | * "Z-Push" is a registered trademark of Zarafa Deutschland GmbH |
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27 | * The licensing of the Program under the AGPL does not imply a trademark license. |
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28 | * Therefore any rights, title and interest in our trademarks remain entirely with us. |
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29 | * |
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30 | * However, if you propagate an unmodified version of the Program you are |
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31 | * allowed to use the term "Z-Push" to indicate that you distribute the Program. |
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32 | * Furthermore you may use our trademarks where it is necessary to indicate |
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33 | * the intended purpose of a product or service provided you use it in accordance |
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34 | * with honest practices in industrial or commercial matters. |
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35 | * If you want to propagate modified versions of the Program under the name "Z-Push", |
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36 | * you may only do so if you have a written permission by Zarafa Deutschland GmbH |
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37 | * (to acquire a permission please contact Zarafa at trademark@zarafa.com). |
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38 | * |
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39 | * This program is distributed in the hope that it will be useful, |
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40 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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41 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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42 | * GNU Affero General Public License for more details. |
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43 | * |
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44 | * You should have received a copy of the GNU Affero General Public License |
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45 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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46 | * |
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47 | * Consult LICENSE file for details |
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48 | ************************************************/ |
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49 | |
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50 | class Streamer implements Serializable { |
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51 | const STREAMER_VAR = 1; |
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52 | const STREAMER_ARRAY = 2; |
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53 | const STREAMER_TYPE = 3; |
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54 | const STREAMER_PROP = 4; |
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55 | const STREAMER_TYPE_DATE = 1; |
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56 | const STREAMER_TYPE_HEX = 2; |
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57 | const STREAMER_TYPE_DATE_DASHES = 3; |
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58 | const STREAMER_TYPE_STREAM = 4; |
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59 | const STREAMER_TYPE_IGNORE = 5; |
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60 | const STREAMER_TYPE_SEND_EMPTY = 6; |
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61 | const STREAMER_TYPE_NO_CONTAINER = 7; |
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62 | const STREAMER_TYPE_COMMA_SEPARATED = 8; |
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63 | const STREAMER_TYPE_SEMICOLON_SEPARATED = 9; |
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64 | const STREAMER_TYPE_MULTIPART = 10; |
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65 | |
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66 | protected $mapping; |
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67 | public $flags; |
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68 | public $content; |
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69 | |
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70 | /** |
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71 | * Constructor |
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72 | * |
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73 | * @param array $mapping internal mapping of variables |
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74 | * @access public |
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75 | */ |
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76 | function Streamer($mapping) { |
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77 | $this->mapping = $mapping; |
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78 | $this->flags = false; |
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79 | } |
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80 | |
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81 | /** |
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82 | * Decodes the WBXML from a WBXMLdecoder until we reach the same depth level of WBXML. |
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83 | * This means that if there are multiple objects at this level, then only the first is |
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84 | * decoded SubOjects are auto-instantiated and decoded using the same functionality |
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85 | * |
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86 | * @param WBXMLDecoder $decoder |
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87 | * |
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88 | * @access public |
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89 | */ |
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90 | public function Decode(&$decoder) { |
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91 | while(1) { |
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92 | $entity = $decoder->getElement(); |
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93 | |
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94 | if($entity[EN_TYPE] == EN_TYPE_STARTTAG) { |
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95 | if(! ($entity[EN_FLAGS] & EN_FLAGS_CONTENT)) { |
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96 | $map = $this->mapping[$entity[EN_TAG]]; |
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97 | if (isset($map[self::STREAMER_ARRAY])) { |
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98 | $this->$map[self::STREAMER_VAR] = array(); |
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99 | } else if(!isset($map[self::STREAMER_TYPE])) { |
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100 | $this->$map[self::STREAMER_VAR] = ""; |
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101 | } |
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102 | else if ($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE || $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE_DASHES ) { |
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103 | $this->$map[self::STREAMER_VAR] = ""; |
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104 | } |
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105 | else if (isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_SEND_EMPTY) |
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106 | $this->$map[self::STREAMER_VAR] = ""; |
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107 | continue; |
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108 | } |
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109 | // Found a start tag |
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110 | if(!isset($this->mapping[$entity[EN_TAG]])) { |
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111 | // This tag shouldn't be here, abort |
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112 | ZLog::Write(LOGLEVEL_WBXMLSTACK, sprintf("Tag '%s' unexpected in type XML type '%s'", $entity[EN_TAG], get_class($this))); |
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113 | return false; |
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114 | } |
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115 | else { |
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116 | $map = $this->mapping[$entity[EN_TAG]]; |
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117 | |
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118 | // Handle an array |
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119 | if(isset($map[self::STREAMER_ARRAY])) { |
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120 | while(1) { |
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121 | //do not get start tag for an array without a container |
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122 | if (!(isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_NO_CONTAINER)) { |
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123 | if(!$decoder->getElementStartTag($map[self::STREAMER_ARRAY])) |
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124 | break; |
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125 | } |
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126 | if(isset($map[self::STREAMER_TYPE])) { |
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127 | $decoded = new $map[self::STREAMER_TYPE]; |
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128 | |
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129 | $decoded->Decode($decoder); |
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130 | } |
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131 | else { |
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132 | $decoded = $decoder->getElementContent(); |
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133 | } |
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134 | |
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135 | if(!isset($this->$map[self::STREAMER_VAR])) |
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136 | $this->$map[self::STREAMER_VAR] = array($decoded); |
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137 | else |
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138 | array_push($this->$map[self::STREAMER_VAR], $decoded); |
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139 | |
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140 | if(!$decoder->getElementEndTag()) //end tag of a container element |
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141 | return false; |
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142 | |
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143 | if (isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_NO_CONTAINER) { |
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144 | $e = $decoder->peek(); |
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145 | //go back to the initial while if another block of no container elements is found |
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146 | if ($e[EN_TYPE] == EN_TYPE_STARTTAG) { |
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147 | continue 2; |
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148 | } |
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149 | //break on end tag because no container elements block end is reached |
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150 | if ($e[EN_TYPE] == EN_TYPE_ENDTAG) |
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151 | break; |
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152 | if (empty($e)) |
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153 | break; |
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154 | } |
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155 | } |
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156 | //do not get end tag for an array without a container |
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157 | if (!(isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_NO_CONTAINER)) { |
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158 | if(!$decoder->getElementEndTag()) //end tag of container |
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159 | return false; |
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160 | } |
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161 | } |
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162 | else { // Handle single value |
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163 | if(isset($map[self::STREAMER_TYPE])) { |
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164 | // Complex type, decode recursively |
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165 | if($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE || $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE_DASHES) { |
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166 | $decoded = $this->parseDate($decoder->getElementContent()); |
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167 | if(!$decoder->getElementEndTag()) |
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168 | return false; |
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169 | } |
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170 | else if($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_HEX) { |
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171 | $decoded = hex2bin($decoder->getElementContent()); |
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172 | if(!$decoder->getElementEndTag()) |
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173 | return false; |
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174 | } |
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175 | // explode comma or semicolon strings into arrays |
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176 | else if($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_COMMA_SEPARATED || $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_SEMICOLON_SEPARATED) { |
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177 | $glue = ($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_COMMA_SEPARATED)?", ":"; "; |
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178 | $decoded = explode($glue, $decoder->getElementContent()); |
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179 | if(!$decoder->getElementEndTag()) |
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180 | return false; |
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181 | } |
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182 | else { |
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183 | $subdecoder = new $map[self::STREAMER_TYPE](); |
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184 | if($subdecoder->Decode($decoder) === false) |
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185 | return false; |
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186 | |
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187 | $decoded = $subdecoder; |
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188 | |
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189 | if(!$decoder->getElementEndTag()) { |
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190 | ZLog::Write(LOGLEVEL_WBXMLSTACK, sprintf("No end tag for '%s'", $entity[EN_TAG])); |
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191 | return false; |
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192 | } |
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193 | } |
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194 | } |
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195 | else { |
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196 | // Simple type, just get content |
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197 | $decoded = $decoder->getElementContent(); |
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198 | |
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199 | if($decoded === false) { |
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200 | // the tag is declared to have content, but no content is available. |
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201 | // set an empty content |
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202 | $decoded = ""; |
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203 | } |
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204 | |
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205 | if(!$decoder->getElementEndTag()) { |
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206 | ZLog::Write(LOGLEVEL_WBXMLSTACK, sprintf("Unable to get end tag for '%s'", $entity[EN_TAG])); |
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207 | return false; |
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208 | } |
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209 | } |
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210 | // $decoded now contains data object (or string) |
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211 | $this->$map[self::STREAMER_VAR] = $decoded; |
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212 | } |
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213 | } |
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214 | } |
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215 | else if($entity[EN_TYPE] == EN_TYPE_ENDTAG) { |
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216 | $decoder->ungetElement($entity); |
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217 | break; |
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218 | } |
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219 | else { |
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220 | ZLog::Write(LOGLEVEL_WBXMLSTACK, "Unexpected content in type"); |
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221 | break; |
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222 | } |
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223 | } |
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224 | } |
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225 | |
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226 | /** |
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227 | * Encodes this object and any subobjects - output is ordered according to mapping |
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228 | * |
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229 | * @param WBXMLEncoder $encoder |
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230 | * |
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231 | * @access public |
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232 | */ |
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233 | public function Encode(&$encoder) { |
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234 | // A return value if anything was streamed. We need for empty tags. |
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235 | $streamed = false; |
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236 | foreach($this->mapping as $tag => $map) { |
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237 | if(isset($this->$map[self::STREAMER_VAR])) { |
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238 | // Variable is available |
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239 | if(is_object($this->$map[self::STREAMER_VAR])) { |
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240 | // Subobjects can do their own encoding |
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241 | if ($this->$map[self::STREAMER_VAR] instanceof Streamer) { |
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242 | $encoder->startTag($tag); |
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243 | $res = $this->$map[self::STREAMER_VAR]->Encode($encoder); |
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244 | $encoder->endTag(); |
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245 | // nothing was streamed in previous encode but it should be streamed empty anyway |
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246 | if (!$res && isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_SEND_EMPTY) |
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247 | $encoder->startTag($tag, false, true); |
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248 | } |
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249 | else |
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250 | ZLog::Write(LOGLEVEL_ERROR, sprintf("Streamer->Encode(): parameter '%s' of object %s is not of type Streamer", $map[self::STREAMER_VAR], get_class($this))); |
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251 | } |
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252 | // Array of objects |
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253 | else if(isset($map[self::STREAMER_ARRAY])) { |
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254 | if (empty($this->$map[self::STREAMER_VAR]) && isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_SEND_EMPTY) { |
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255 | $encoder->startTag($tag, false, true); |
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256 | } |
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257 | else { |
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258 | // Outputs array container (eg Attachments) |
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259 | // Do not output start and end tag when type is STREAMER_TYPE_NO_CONTAINER |
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260 | if (!isset($map[self::STREAMER_PROP]) || $map[self::STREAMER_PROP] != self::STREAMER_TYPE_NO_CONTAINER) |
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261 | $encoder->startTag($tag); |
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262 | |
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263 | foreach ($this->$map[self::STREAMER_VAR] as $element) { |
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264 | if(is_object($element)) { |
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265 | $encoder->startTag($map[self::STREAMER_ARRAY]); // Outputs object container (eg Attachment) |
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266 | $element->Encode($encoder); |
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267 | $encoder->endTag(); |
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268 | } |
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269 | else { |
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270 | if(strlen($element) == 0) |
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271 | // Do not output empty items. Not sure if we should output an empty tag with $encoder->startTag($map[self::STREAMER_ARRAY], false, true); |
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272 | ; |
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273 | else { |
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274 | $encoder->startTag($map[self::STREAMER_ARRAY]); |
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275 | $encoder->content($element); |
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276 | $encoder->endTag(); |
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277 | $streamed = true; |
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278 | } |
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279 | } |
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280 | } |
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281 | |
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282 | if (!isset($map[self::STREAMER_PROP]) || $map[self::STREAMER_PROP] != self::STREAMER_TYPE_NO_CONTAINER) |
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283 | $encoder->endTag(); |
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284 | } |
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285 | } |
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286 | else { |
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287 | if(isset($map[self::STREAMER_TYPE]) && $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_IGNORE) { |
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288 | continue; |
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289 | } |
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290 | |
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291 | if ($encoder->getMultipart() && isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_MULTIPART) { |
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292 | $encoder->addBodypartStream($this->$map[self::STREAMER_VAR]); |
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293 | $encoder->startTag(SYNC_ITEMOPERATIONS_PART); |
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294 | $encoder->content(count($encoder->getBodypartsCount())); |
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295 | $encoder->endTag(); |
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296 | continue; |
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297 | } |
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298 | |
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299 | // Simple type |
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300 | if(!isset($map[self::STREAMER_TYPE]) && strlen($this->$map[self::STREAMER_VAR]) == 0) { |
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301 | // send empty tags |
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302 | if (isset($map[self::STREAMER_PROP]) && $map[self::STREAMER_PROP] == self::STREAMER_TYPE_SEND_EMPTY) |
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303 | $encoder->startTag($tag, false, true); |
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304 | |
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305 | // Do not output empty items. See above: $encoder->startTag($tag, false, true); |
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306 | continue; |
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307 | } else |
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308 | $encoder->startTag($tag); |
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309 | |
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310 | if(isset($map[self::STREAMER_TYPE]) && ($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE || $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_DATE_DASHES)) { |
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311 | if($this->$map[self::STREAMER_VAR] != 0) // don't output 1-1-1970 |
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312 | $encoder->content($this->formatDate($this->$map[self::STREAMER_VAR], $map[self::STREAMER_TYPE])); |
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313 | } |
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314 | else if(isset($map[self::STREAMER_TYPE]) && $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_HEX) { |
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315 | $encoder->content(strtoupper(bin2hex($this->$map[self::STREAMER_VAR]))); |
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316 | } |
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317 | else if(isset($map[self::STREAMER_TYPE]) && $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_STREAM) { |
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318 | //encode stream with base64 |
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319 | $stream = $this->$map[self::STREAMER_VAR]; |
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320 | $stat = fstat($stream); |
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321 | // the padding size muss be calculated for the entire stream, |
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322 | // the base64 filter seems to process 8192 byte chunks correctly itself |
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323 | $padding = (isset($stat['size']) && $stat['size'] > 8192) ? ($stat['size'] % 3) : 0; |
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324 | |
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325 | $paddingfilter = stream_filter_append($stream, 'padding.'.$padding); |
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326 | $base64filter = stream_filter_append($stream, 'convert.base64-encode'); |
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327 | $d = ""; |
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328 | while (!feof($stream)) { |
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329 | $d .= fgets($stream, 4096); |
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330 | } |
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331 | $encoder->content($d); |
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332 | stream_filter_remove($base64filter); |
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333 | stream_filter_remove($paddingfilter); |
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334 | } |
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335 | // implode comma or semicolon arrays into a string |
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336 | else if(isset($map[self::STREAMER_TYPE]) && is_array($this->$map[self::STREAMER_VAR]) && |
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337 | ($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_COMMA_SEPARATED || $map[self::STREAMER_TYPE] == self::STREAMER_TYPE_SEMICOLON_SEPARATED)) { |
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338 | $glue = ($map[self::STREAMER_TYPE] == self::STREAMER_TYPE_COMMA_SEPARATED)?", ":"; "; |
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339 | $encoder->content(implode($glue, $this->$map[self::STREAMER_VAR])); |
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340 | } |
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341 | else { |
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342 | $encoder->content($this->$map[self::STREAMER_VAR]); |
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343 | } |
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344 | $encoder->endTag(); |
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345 | $streamed = true; |
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346 | } |
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347 | } |
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348 | } |
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349 | // Output our own content |
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350 | if(isset($this->content)) |
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351 | $encoder->content($this->content); |
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352 | |
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353 | return $streamed; |
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354 | } |
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355 | |
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356 | /** |
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357 | * Removes not necessary data from the object |
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358 | * |
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359 | * @access public |
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360 | * @return boolean |
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361 | */ |
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362 | public function StripData() { |
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363 | foreach ($this->mapping as $k=>$v) { |
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364 | if (isset($this->$v[self::STREAMER_VAR])) { |
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365 | if (is_object($this->$v[self::STREAMER_VAR]) && method_exists($this->$v[self::STREAMER_VAR], "StripData") ) { |
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366 | $this->$v[self::STREAMER_VAR]->StripData(); |
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367 | } |
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368 | else if (isset($v[self::STREAMER_ARRAY]) && !empty($this->$v[self::STREAMER_VAR])) { |
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369 | foreach ($this->$v[self::STREAMER_VAR] as $element) { |
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370 | if (is_object($element) && method_exists($element, "StripData") ) { |
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371 | $element->StripData(); |
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372 | } |
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373 | } |
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374 | } |
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375 | } |
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376 | } |
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377 | unset($this->mapping); |
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378 | |
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379 | return true; |
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380 | } |
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381 | |
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382 | /** |
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383 | * Method to serialize a Streamer and respective SyncObject |
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384 | * |
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385 | * @access public |
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386 | * @return array |
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387 | */ |
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388 | public function serialize() { |
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389 | $values = array(); |
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390 | foreach ($this->mapping as $k=>$v) { |
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391 | if (isset($this->$v[self::STREAMER_VAR])) |
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392 | $values[$v[self::STREAMER_VAR]] = serialize($this->$v[self::STREAMER_VAR]); |
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393 | } |
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394 | |
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395 | return serialize($values); |
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396 | } |
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397 | |
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398 | /** |
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399 | * Method to unserialize a Streamer and respective SyncObject |
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400 | * |
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401 | * @access public |
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402 | * @return array |
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403 | */ |
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404 | public function unserialize($data) { |
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405 | $class = get_class($this); |
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406 | $this->$class(); |
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407 | $values = unserialize($data); |
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408 | foreach ($values as $k=>$v) |
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409 | $this->$k = unserialize($v); |
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410 | |
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411 | return true; |
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412 | } |
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413 | |
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414 | /**---------------------------------------------------------------------------------------------------------- |
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415 | * Private methods for conversion |
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416 | */ |
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417 | |
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418 | /** |
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419 | * Formats a timestamp |
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420 | * Oh yeah, this is beautiful. Exchange outputs date fields differently in calendar items |
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421 | * and emails. We could just always send one or the other, but unfortunately nokia's 'Mail for |
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422 | * exchange' depends on this quirk. So we have to send a different date type depending on where |
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423 | * it's used. Sigh. |
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424 | * |
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425 | * @param long $ts |
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426 | * @param int $type |
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427 | * |
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428 | * @access private |
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429 | * @return string |
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430 | */ |
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431 | private function formatDate($ts, $type) { |
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432 | if($type == self::STREAMER_TYPE_DATE) |
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433 | return gmstrftime("%Y%m%dT%H%M%SZ", $ts); |
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434 | else if($type == self::STREAMER_TYPE_DATE_DASHES) |
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435 | return gmstrftime("%Y-%m-%dT%H:%M:%S.000Z", $ts); |
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436 | } |
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437 | |
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438 | /** |
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439 | * Transforms an AS timestamp into a unix timestamp |
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440 | * |
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441 | * @param string $ts |
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442 | * |
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443 | * @access private |
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444 | * @return long |
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445 | */ |
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446 | function parseDate($ts) { |
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447 | if(preg_match("/(\d{4})[^0-9]*(\d{2})[^0-9]*(\d{2})(T(\d{2})[^0-9]*(\d{2})[^0-9]*(\d{2})(.\d+)?Z){0,1}$/", $ts, $matches)) { |
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448 | if ($matches[1] >= 2038){ |
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449 | $matches[1] = 2038; |
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450 | $matches[2] = 1; |
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451 | $matches[3] = 18; |
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452 | $matches[5] = $matches[6] = $matches[7] = 0; |
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453 | } |
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454 | |
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455 | if (!isset($matches[5])) $matches[5] = 0; |
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456 | if (!isset($matches[6])) $matches[6] = 0; |
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457 | if (!isset($matches[7])) $matches[7] = 0; |
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458 | |
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459 | return gmmktime($matches[5], $matches[6], $matches[7], $matches[2], $matches[3], $matches[1]); |
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460 | } |
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461 | return 0; |
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462 | } |
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463 | } |
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464 | |
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465 | ?> |
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